Those cards are Brainstorm, Sol Ring, Kodama's Reach, the Signets, Fire // Ice, and Cultivate
Despite costing no mana the need to have three upfront makes it a bit slow as well as losing a card for use as pure card quality
This is Ripening Charge, which lets you attach a Basic Grass Energy to one of your Pokemon
Ritual engine consists of exactly 15 cards, which could be replaced by the side deck to turn this deck a more pure Blue-Eyes Dragon Link build
For example, the most popular methods might be the following websites: TCGplayer PokeDATA Let's start with the PokeDATA website which has recently started getting traction amongst Pokmon collectors
Sinister pairs well with Abyss Soldier, while Night Assailant and Dekoichi go hand-in-hand